The strikes occurred in the city of Homs injuring many and destroying numerous homes, said the Syrian Revolution General Commission.
The Syrian Civil Defense teams - a group of volunteer aid workers - have tended to the victims.
On Monday evening, another 10 people were killed and 40 others injured by the Syrian regime’s airstrikes in Kafr Takharim, a town located in the Idlib governorate in northwestern Syria, according to the head of the Syrian Civil Defense in the area.
“Most of the victims are civilians. We are still looking for two children under destroyed buildings’ rubbles,” Ahmed Khadour said.
“The number of the killed people is increasing while many injured are in a critical condition due to the lack of the field hospital’s supplies,” said the head of the field hospital in Kafr Takharim, Samer Hawa.
The Idlib region, which is under control of opposition groups such as Al-Nusra, regularly suffers from raids by the Syrian regime.
Its airstrikes have intensified against civilians in the area after opposition factions led by Al-Nusra have seized Wadi Al-Dayf and Al-Hamidiyeh on Monday morning, two important regime army bases.
The Syrian Revolution General Commission represents a unified coalition of Syrian opposition groups that aims to establish a democratic set up in Syria. The Al-Nusra Front is a militant opposition group, which is reported to be allied with Al-Qaida.
Opposition forces in March 2011 began protests to topple President Bashar Al-Assad, a struggle that turned into a civil war in July of that year after the regime forces violently suppressed the demonstrations.